. The American annual of photography. A—Outside frame of shutter. BB—Circumference of lenses. C—Half of the circum-ference covered up, marking half of the lenses. C—The open part of lenses, equal to theother half which is covered. What is the result ? The diagram will furnish the explana-tion. 0 0 K E*. Let us suppose that 00 embraces view reflected by the objec-tive, divided in two parts: OA the skjyAO objects in nature. 33 >2j 33 PJ 33 >n

---

Size: 1317px × 1898px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: ., bookcentury1800, bookdecade1890, bookpublishernewyo, bookyear1892